JoinThread.java

Thread newThread = new Thread(() -> {
            System.out.println("Thread : "+ Thread.currentThread().getName());
            try {
                Thread.sleep(2000L);
            } catch (InterruptedException e) {
                System.out.println("Exit!");
                return;
            }
        });

// join a thread work to a main thread
newThread.start();
newThread.join();
System.out.println(newThread+" is finished");